وَلَا يَقْرَأُ الْمُؤْتَمُّ بَلْ يَسْتَمِعُ وَيَنْصِتُ، وَإِنْ قَرَأَ كُرِهَ تَحْرِيمًا
In the Hanafi rule stated by this source, the follower does not recite Quran behind the Imam; the follower listens in audible prayer and remains silent in quiet prayer. If the follower recites, the text classifies it as Makruh Tahrimi.